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PATENTED FEB. 9, 1904.

0. F. ADAMS. GOMMUTATOR LEAD AND MODE OF MAKING SAME.

APPLICATION FILED AUG. 8, 1903.

N0 MODEL.

' WITNESSES:

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UNITED STATES Patented February 9, 1904.

PATENT OFFICE.

CHARLES F. ADAMS, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO STANLEY ELECTRIC MANUFACTURING COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION OF NEWV JERSEY.

COMMUTATOR-LEAD AND MODE OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 751,440, dated. February 9, 1904.

Application filed August 8, 1903.

To all whom, it may concern.-

Be it known that I, CHARLEs F. ADAMs, a citizen of the United States, and a resident of Iittsfield, Massachusetts, have invented certain new and useful Improvements in Commutator-Leads and Mode of Making Same, of which the following is a specification.

My invention relates to leads for commutators of dynamo-electric machines; and its object is to provide a lead which shall be more simple, eficient, and economical than those heretofore constructed.

In the accompanying drawings, Figure 1 shows a lead constructed in accordance with my invention. Fig. 2 is a side view of the same. Fig. 3 shows the lead after it is stamped out. Fig. 4: shows a side view of the same. Fig. 5 shows a modified form of the lead. Fig. 6 shows a cross-section of the same. Fig. 7 shows the modified form stamped out, Fig. 8 is a side View of the same.

In Fig. 1, A represents the commutatorlead, which is set into a slot in commutatorbar B. C represents an armature-conductor, which is fitted into the forked end of commutator-lead A.

The method of forming the lead is as follows: The lead is stamped out of sheetcop per or other conducting material in the form shown in Fig. 3 and a slit is out part way down the median line, as shown. The sheet is also bent near the bottom of the slit, as shown in Fig. A. The sheet is then folded over on the median line and the two parts fastened together in any suitable manner, as by the rivet a, as shown in Fig. 1. It will be seen that not more than a single rivet is required. The stamping out of the lead and the slitting of the end may be performed in a single operation, and then by folding over and pressing together the lead is completely formed.

Fig. 5 shows a modified form in which a bead or rib is left on the edge of the lead for the sake of lateral stiffness. The process of stamping and folding is the same as has already been described, the bead or rib being formed in the stamping operation, as shown by the groove in Fig. 7 It is not essential that the transverse bend at the bottom of the slit Serial No. 168,725. (No model.)

(shown in Figs. 4 and 8) should be formed when the lead is stamped out. This bend may be formed after the strip is folded over.

I do not desire to limit myself to the particular construction and arrangement of parts here shown, since changes therein which do not depart from the spirit of my invention and which are within the scope of the appended claims will be obvious to those skilled in the art.

' Having thus fully described my invention, I claim as new anddesire to protect by Letters Patent 1. The process of making commutator-leads which consists in stamping out strips of sheet metal, slitting one end of said strips along the median line, and folding said strips on the median line.

9.. The process of making commutator-leads which consists in stamping out of sheet metal strips slitted at one end along the median line, and folding said strips on said median line.

3. The process of making co1nmutator-leads which consists in stamping out of sheet metal strips slitted part way along the median line and grooved the rest of the way along said line, and folding said strips on said groove.

4. As a new article of manufacture, a commutator-lead formed of a single strip of sheet metal folded along its median line and split at one end along said line.

5. As a new article of manufacture, a commutator-lead formed of a single strip of sheet metal folded along its median line and split at one end along said line, the ears formed by said split being bent apart to receive an armature-conductor.

6. As a new article of manufacture, a commutator-lead formed of a single strip of sheet metal folded along its median line in such manner as to form a rib along said line, said strip being split at one end along said line.

Signed at Pittsfield, Massachusetts, this 3d day of August, 1903.

CHARLES F. ADAMS.

Witnesses:

L. A. HAwKINs, R. E.I-IAYNEs. 

